From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 515 invoked by alias); 15 Mar 2011 09:10:03 -0000 Received: (qmail 497 invoked by uid 22791); 15 Mar 2011 09:10:02 -0000 X-SWARE-Spam-Status: No, hits=-6.3 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_HI,SPF_HELO_PASS,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 15 Mar 2011 09:09:48 +0000 Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id p2F99f7h010242 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 15 Mar 2011 05:09:42 -0400 Received: from hase (ovpn01.gateway.prod.ext.phx2.redhat.com [10.5.9.1]) by int-mx02.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id p2F99d40028695; Tue, 15 Mar 2011 05:09:40 -0400 From: Andreas Schwab To: danny.backx@scarlet.be Cc: gdb Subject: Re: gdb influencing app behaviour ? References: <1300134373.2002.8.camel@pavilion> X-Yow: Hello. I know the divorce rate among unmarried Catholic Alaskan females!! Date: Tue, 15 Mar 2011 09:10:00 -0000 In-Reply-To: <1300134373.2002.8.camel@pavilion> (Danny Backx's message of "Mon, 14 Mar 2011 21:26:13 +0100") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org X-SW-Source: 2011-03/txt/msg00100.txt.bz2 Danny Backx writes: > The application appears to behave differently when I set a breakpoint in > that function. (The application and the library were both trying to read > from the socket, by setting the breakpoint the other one would always > win the race.) > > How can this be explained ? Any debugger will change the timing of the debuggee. Andreas. -- Andreas Schwab, schwab@redhat.com GPG Key fingerprint = D4E8 DBE3 3813 BB5D FA84 5EC7 45C6 250E 6F00 984E "And now for something completely different."